Randomization in an experimental design assures
a. external validity of the findings.
b. the relevance of the hypothesis in question.
c. accurate observation of the dependent variable.
d. statistical equivalence of groups.
e. lack of pretest sensitivity.
Question 2
The fact that young children's articulation problems often disappear by themselves over time indicates why researchers must use ____in order to have internal validity.
a. control groups
b. informed consent
c. objective measurement
d. pre- and postmeasures
e. statistical analysis
Loewi's experimental discovery of chemical neurotransmission.
Schematic of an automated external defibrillator (AED) attached to a patient.
External beam radiotherapy.
A typical engine design that uses both pressure and splash lubrication. Oil travels under pressure ...
Development of the Eyes and Ears: External View - 28 days Embryo
These findings are from Colby and Kohlberg's long-term longitudinal study